<template>
    <div>
        <!-- 三级分类 -->
        <Category :scene="scene"></Category>
        <el-card style="margin:10px 0px">
            <!-- v-if|v-show:都可以实现显示与隐藏 -->
            <div v-show="scene == 0">
                <el-button @click="addSpu" type="primary" size="default" icon="Plus"
                    :disabled="categoryStore.c3Id ? false : true">添加SPU</el-button>
                <!-- 展示已有SPU数据 -->
                <el-table style="margin: 10px 0px;" border :data="records">
                    <el-table-column label="序号" type="index" align="center" width="80px"></el-table-column>
                    <el-table-column label="SPU名称" prop="spuName"></el-table-column>
                    <el-table-column label="SPU描述" prop="description" show-overflow-tooltip></el-table-column>
                    <el-table-column label="SPU操作">
                        <!-- row:即为已有的SPU对象 -->
                        <template #="{ row, $index }">
                            <el-button type="primary" size="small" icon="Plus" title="添加SKU"></el-button>
                            <el-button type="primary" size="small" icon="Edit" title="修改SPU"
                                @click="updateSpu(row)"></el-button>
                            <el-button type="primary" size="small" icon="View" title="查看SKU列表"></el-button>
                            <el-button type="primary" size="small" icon="Delete" title="删除SPU"></el-button>
                        </template>
                    </el-table-column>
                </el-table>
                <!-- 分页器 -->
                <el-pagination v-model:current-page="pageNo" v-model:page-size="pageSize" :page-sizes="[3, 5, 7, 9]"
                    :background="true" layout="prev, pager, next, jumper,->,sizes,total" :total="total"
                    @current-change="getHasSpu" @size-change="changeSize" />
            </div>
            <!-- 添加SPU|修改SPU子组件 -->
            <SpuForm ref="spu" v-show="scene == 1" @changeScene="changeScene"></SpuForm>
            <!-- 添加SKU的子组件 -->
            <SkuForm v-show="scene == 2"></SkuForm>
        </el-card>
    </div>
</template>

<script setup lang="ts">
import type { HasSpuResponseData, Records } from '@/api/product/spu/type'
import { ref, watch } from 'vue';
import { reqHasSpu } from '@/api/product/spu';
//引入分类的仓库
import useCategoryStore from '@/store/modules/category';
import type { SpuData } from '@/api/product/spu/type'
import SpuForm from './spuForm.vue';
import SkuForm from './skuForm.vue';
let categoryStore = useCategoryStore();
//场景的数据
let scene = ref<number>(0); //0:显示已有SPU  1:添加或者修改已有SPU 2:添加SKU的结构
//分页器默认页码
let pageNo = ref<number>(1);
//每一页展示几条数据
let pageSize = ref<number>(3);
//存储已有的SPU的数据
let records = ref<Records>([]);
//存储已有SPU总个数
let total = ref<number>(0);
//获取子组件实例SpuForm
let spu = ref<any>();

//监听三级分类ID变化
watch(() => categoryStore.c3Id, () => {
    //当三级分类发生变化的时候清空对应的数据
    records.value = [];
    //务必保证有三级分类ID
    if (!categoryStore.c3Id) return;
    getHasSpu();
});

//此方法执行:可以获取某一个三级分类下全部的已有的SPU
const getHasSpu = async (pager = 1) => {
    //修改当前页码
    pageNo.value = pager;
    let result: HasSpuResponseData = await reqHasSpu(pageNo.value, pageSize.value, categoryStore.c3Id);
    if (result.code == 200) {
        records.value = result.data.records;
        total.value = result.data.total;
    }
}
//分页器下拉菜单发生变化的时候触发
const changeSize = () => {
    getHasSpu();
}

//添加新的SPU按钮的回调
const addSpu = () => {
    //切换为场景1:添加与修改已有SPU结构->SpuForm
    scene.value = 1;
}
//修改已有的SPU的按钮的回调
const updateSpu = (row: SpuData) => {
    //切换为场景1:添加与修改已有SPU结构->SpuForm
    scene.value = 1;
    //调用子组件实例方法获取完整已有的SPU的数据
    spu.value.initHasSpuData(row);
}

//子组件SpuForm绑定自定义事件:目前是让子组件通知父组件切换场景为0
const changeScene = (num: number) => {
    //子组件Spuform点击取消变为场景0:展示已有的SPU
    scene.value = num;
}

</script>

<style scoped></style>